client.py

import requests
from pynput.keyboard import Key, Listener
import serial

# your android phone local ip address
url = "http://192.168.0.101:5000"
last_key = str(Key.caps_lock) + "P"

FORWARD_ON = "0"
FORWARD_OFF = "1"
BACKWARD_ON = "2"
BACKWARD_OFF = "3"
LEFT_ON = "4"
LEFT_OFF = "5"
RIGHT_ON = "6"
RIGHT_OFF = "7"

# ser = serial.Serial('/dev/tty.usbmodem1101')
# print(ser.name)

# TODO: change left and right controls
def on_press(key):
    print("{0} pressed".format(key))
    global last_key
    if str(key) + "P" != last_key:
        if key == Key.up:
            requests.post(url, FORWARD_ON)
            # ser.write(b'0')
        if key == Key.down:
            requests.post(url, BACKWARD_ON)
            # ser.write(b'2')
        if key == Key.right:
            requests.post(url, LEFT_ON)
            # ser.write(b'6')
        if key == Key.left:
            requests.post(url, RIGHT_ON)
            # ser.write(b'4')
    last_key = str(key) + "P"


def on_release(key):
    print("{0} released".format(key))
    global last_key
    if str(key) + "R" != last_key:
        if key == Key.up:
            requests.post(url, FORWARD_OFF)
            # ser.write(b'1')

        if key == Key.down:
            requests.post(url, BACKWARD_OFF)
            # ser.write(b'3')
        if key == Key.right:
            requests.post(url, LEFT_OFF)
            # ser.write(b'7')
        if key == Key.left:
            requests.post(url, RIGHT_OFF)
            # ser.write(b'5')
    last_key = str(key) + "R"


with Listener(on_press=on_press, on_release=on_release) as listener:
    listener.join()